Dark Energy Model with Spinor Matter and Its Quintom Scenario
نویسندگان
چکیده
A class of dynamical dark energy models, dubbed Spinor Quintom, can be constructed by a spinor field ψ with a nontraditional potential. We find that, if choosing suitable potential, this model is able to allow the equation-of-state to cross the cosmological constant boundary without introducing any ghost fields. In a further investigation, we show that this model is able to mimic a perfect fluid of Chaplygin gas with p = −c/ρ during the evolution, and also realizes the Quintom scenario with its equation-of-state across −1.
منابع مشابه
Quintom dark energy in DGP braneworld cosmology
In this paper we consider a Z2 symmetrical 3-brane embedded in a 5-dimensional spacetime. We study the effective Einstein equation and acceleration condition in presence of the quintom dark energy fluid as the bulk matter field. The effective Einstein equation on the brane in the framework of DGP model is obtained where the quintom field is considered as the bulk matter field, and a quintom dar...
متن کاملThe Quintom Model of Dark Energy
In this paper I give a brief review on the recently proposed new scenario of dark energy model dubbed Quintom. Quintom describes the dynamical dark energy models where the equation of state getting across the cosmological constant boundary during evolutions. I discuss some aspects on the quintom model buildings and the observational consequences.
متن کاملInteracting Dark Energy
In this paper I discuss some of the phenomenologies of models of the dark energy interacting with the ordinary matter. After a very brief review about the current constraint on the equation of the state of the dark energy from the SN and a new scenario of dark energy the Quintom, I present models of Quintessential Baryo(Lepto)genesis, Quintessino dark matter and mass varying neutrinos in details.
متن کاملFirst - order formalism for the quintom model of dark energy
The present paper deals to the quintom model of dark energy. We introduce a first-order formalism, which shows how to relate the potential that specifies the scalar field model to Hubble parameter. Reviewing briefly the quintom scenario of dark energy, we present a general procedure to solve the equations of motion for quintom model driven by a couple scalar fields with first-order differential...
متن کاملQuintom dark energy in the DGP braneworld cosmology
In this paper we consider a Z2 symmetrical 3-brane embedded in a 5-dimensional spacetime. We study the effective Einstein equation and acceleration condition in presence of the quintom dark energy fluid as the bulk matter field. It is shown that the time-dependent bulk quintom field induces a time-dependent cosmological constant on the brane. In the framework of the DGP model, the effective Ein...
متن کامل